The region of the root-tip which is involved in the formation of root hairs by epidermal cells is called the
region of maturation.
region of meristematic activity.
region of elongation.
none of the above.
Correct Answer :
A. region of maturation.
Region of maturation lies above the region of elongation. The cells of the elongation zone gradually differentiate and mature. Epidermal cells of this region form delicate thread like root hair, which helps in the absorption of water and minerals from the soil.
Related Questions
Which of the following part elongates directly and leads to the formation of primary roots?
bud
radicle
plumule
root hair
It is a proteinous layer and the outer covering of endosperm which separates the embryo. Identify the layer.
Tegmen
Scutellum
Hyaline layer
Aleurone layer
The part of the root which is most active in water absorption is called
root cap
maturation zone
meristematic zone
zone of elongation
The given figures (A and B) shows the modificaiton of roots.Which of the following statements regarding the figures is correct ?
Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.
Pneumatophores conducts water, minerals & photosynthesis
Pneumatophore is found in the plants that grow in sandy soil.
Turnip & carrot shows adventitious roots and sweet potato shows tap root.
Prop roots of banyan tree are meant for
respiration.
absorption of water from soil.
providing support to big tree.
all of the above.
Which is not a stem modification ?
Rhizome of ginger
Corm of Colocasia
Pitcher of Nepenthes
Tuber of potato
Statement-1 : Ginger has a prostrate-growing rhizome.
Statement-2 : Shoot growth is not effected by gravity.
Statement-1 and statement-2 are true and Statement-2 is a correct explanation for statement-1.
Statement-1 and statement-2 are true but statement-2 is a correct explanation for statement-1.
Statement-1 is true and statement-2 is false.
Both the statements are false.
Leaves of dicotyledonous plants possess _________ venation, while _________ venation is the characteristic of most monocotyledons.
reticulate and parallel
parallel and reticulate
reticulate and perpendicular
obliquely and parallel
Study the following statements and select the correct option
- Buds are present in axil of leaflets of the compound leaf.
- Pulvinus leaf-base is present in some leguminous plants.
- In Alstonia, the petioles expand, become green and synthesize food.
- Opposite phyllotaxy is seen in guava.
(ii) and (iv) are correct but (i) and (iii) are incorrect.
(i) and (iii) are correct but (ii) and (iv) are incorrect.
(i) and (iv) are correct but (ii) and (iii) are incorrect.
(ii), (iii) and (iv) are correct but (i) is incorrect.
Which of the following statement(s) is/are correct about the fruit?
- Fruit is a mature or ripened ovary, developed before fertilization.
- It consists of a wall or pericarp and seeds.
- When pericarp is thick and fleshy, it is differentiated into outer mesocarp, middle epicarp and the inner endocarp.
- In mango and coconut, the fruit is known as a berry.
Only (i)
Both (ii) and (iii)
Only (ii)
All of these
Main function of leaf is
exchange of gases
increase the beauty of a tree
manufacturing of food
nerve impulse induction
Which of the following plants is growing in swampy areas, where many roots come out of the ground and grow vertically upwards?
Potato
Opuntia
Rhizophora
Grass
Cotyledons and testa respectively are edible parts in which of the following group?
walnut and tamarind
cashew nut and litchi
french bean and coconut
groundnut and pomegranate
Which of the following statement(s) is /are correct?
- Many plants belong to family fabaceae are good ornamentals (Tulip, Gloriosa), source of medicine (Aloe) and vegetables (Asparagus).
- The plumule and radicle are enclosed in sheaths which are called coleorhiza and coleoptile respectively.
- A flower having either only stamens or only carpels is unisexual.
- Basal, alternate, linear, exstipulate with parallel venation types of leaves is found in the family liliaceae.
Only (i)
Both (i) and (ii)
Both (iii) and (iv)
All of these
The mature seeds of plants such as gram and peas, possess no endosperm, because
these plants are not angiosperms.
there is no double fertilization in them.
endosperm is not formed in them.
endosperm gets used up by the developing embryo during seed development.
The given figure shows the parts of flowering plant. Which parts of the given figure were involved in the following functions:
- Storing reserve food material
- Synthesis of plant growth regulators.
- Absorption of water and minerals from the soil.
- Providing a proper anchorage to the plant parts
5 and 6
1, 2 and 6
1, 2, 3 and 4
2, 4, 5 and 6
A sterile stamen is known as
staminode
anther
pollen grain
filament
Which one of the following structure is not associated with gynoecium?
Ovary
Style
Stigma
Filament
Which of the following statements are correct about the leaf?
- Leaf is a lateral, generally flattened structure borne on the stem.
- It develops at the node and bears a bud in its axil.
- Leaves originate from root apical meristems and arranged in an acropetal order.
- They are the most important vegetative organs for reproduction.
(i) and (ii)
(ii) and (iii)
(i), (ii) and (iv)
all of these
Which of the following is not the characteristic features of fabaceae?
Tap root system, compound leaves and raceme inflorescence.
Flowers actinomorphic, twisted aestivation and gamopetalous.
Stamens 10, introrse, basifixed, dithecous.
Monocarpellary, ovary superior and bent stigma.
A scar on the seed coat through which the developing seeds attached to the fruit is called as ________.
testa
tegmen
hilum
micropyle
Which one of the following characteristics does not belong to parietal placentation?
Ovules are borne on central axis.
Ovary is one-chambered but it becomes two-chambered due to the formation of false septum.
Examples are mustard and Argemone.
Both (b) and (c)
Identify the different types of aestivation (A, B, C and D) in corolla and select the correct option.
A-Valvate, B-Twisted, C-Imbricate, D-Vexillary
A-Vexillary, B-Valvate, C-Twisted, D-Imbricate
A-Imbricate, B-Vexillary, C-Valvate, D-Twisted
A-Twisted, B-Imbricate, C-Vexillary, D-Valvate
Statement 1 : A simple leaf has undivided lamina.
Statement 2 : Leaves showing pinnate and palmate venations have various type of incisions.
Statement-1 and statement-2 are true and statement-2 is a correct explanation for statement -1.
Statement -1 and statement -2 are true but statement-2 is not a correct explanation for statement-1.
Statement-1 is true and statement-2 is false.
Both the statements are false.
The root differs from stem in having
nodes and internodes
axillary buds
multicellular hairs
unicellular hairs
Which of the following statement(s) is/are correct about calyx?
Calyx is the outermost whorl of the flower and are called sepals.
Sepals are green, leaf like and protect the flower in the bud stage.
The calyx may be gamosepalous (sepals free) or polysepalous (sepals united).
Both (a) and (b)
The given figure (A, B, and C) shows different types of roots. Identify the root which is seen in wheat plant and originate from the base of the stem?
A
B
C
Both A and B
Match column-I with column-II and choose the correct option.
| A. Gram, sem, moong, | I. Medicine soyabean |
|---|---|
| B. Soyabean,groundnut | II. Ornamental |
| C. Indigofera | III. Fodder |
| D. Sunhemp | IV. Fibres |
| E. Sesbania, Trifolium | V. Dye |
| F. Lupin, sweet potato | VI. Edible oil |
| G. Mulethi | VII. Pulses |
A I, B II, C III, D IV, E V, F VI, G VII
A VII, B VI, C V, D IV, E III, F II, G I
A II, B IV, C VI, D I, E III, F V, G VII
A I, B III, C V, D VII, E II, F IV, G VI
Most prominent function of inflorescence is
dispersal of seeds.
formation of more fruits.
formation of pollen grains.
dispersal of pollens.
Stem tendrils are found in
cucumber
pumpkins
grapevines
all of these